Drink vending machine



Dlct.l 12, 1933. ESCHIETZEL v 1,939,280`

. DRINK VENDING MACHINE Filed Sept. 6. 1932 5 Sheets-Sheet 2 wa ci 233 230 6. N

, me 257' 5 256 eej 232250 2355 Z5/33 /5123 INVENToR.

ATTORNEY.

E.'SCHIETZEL DRINK VENDLNG MACHINE Filed Sept. 6. 1932 5 Sheets-Sheet 3 A TTORNEY.

Dec. 12, 1933. E: scHlETzEL DRINK VENDING ,MACHINE m ma w h. m.e mm u 5 @d M 5 Y nu n hm. 9 1 I 6. .Ilrll ...u p e 1 S d e l .l F

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5 Sheets-Sheet 5 Filed Sept. 6. 1952 Ilg ' ATTORNEY.

Patented Dec. l2, 1933 1,939,280 DRINK vENnlNG MACHINE Erick vsemmai,dimm,Kaum.

Application September 6, 1932. Serial No. 631,831

14 claims. (C1. c25-2 1) My invention relates to apparatus for vending drinks and more particularly to a device of that character adapted for supplying carbonated drinks of various flavors to customers, the principal object of the invention being to provide a compact machine from which a measured quantity of cooled water charged in the machine with carbon dioxide gas and thoroughly commingled with a measured quantity of selected avoring syrup may be drawn upon insertion of a coin of a required denomination into the machine.

A further object of the invention is to provide a machine of'this character that is sanitary and that can be actuated by the normal pressure of a city water main.

In accomplishing these and other objects` of my invention I have provided Iimproved details of structure, the preferred form of which is illustrated in the accompanying drawings, wherein: Fig. 1 is a perspective View olf a drink vending machine constructed in accordance with my invention, portions of the machine walls being broken away for'better disclosure of the vending apparatus.

Fig. 2 is a plan view of the machine with its cover removed for disclosing the cooling coil syrup containers and other vending mechanism.

Fig. 3 is a vertical section on the line 3 3, Fig. 2, particularly illustrating the relation of the syrup containers and valve actuating mechanism to each other. v

Fig. 4 is a perspective view. of a valve block, charging chamber and associated control cylinder, theupper end of the block being shown in section to disclose the valves controlling ilow through the water and gas supply conduits.

Fig. 5 is a similar view with the block cut away near its lower end to disclose the valves controlling drain and vent conduits.

- Fig. 6 is an enlarged sectional view on the line 66, Fig. 2, illustrating the position of a control piston for effecting discharge of syrup into a syrup chamber.

Fig. 7 is a similar view showing the piston in a position for effecting discharge of the syrup into a mixing ichamber.

Fig. 8 is an elevational view of a coin controlled switch-actuating mechanism for operating valves in water supply and drain conduits.

Fig. 9 is an enlarged view showing the relative positions of an operating plunger and `a toggle switch when a coin is placed in the coin control.

Fig. 10 is an elevational view of cooperating latch members used for selecting the desired iiavor for a drink.

Referring more in detail to the drawings: 1 designates a cabinet preferably comprising front and rear frame members 2 and 3 providing legs for the cabinet and connected at their upper ends by horizontal portions 4 and 5. lThe legs 60 are connected adjacent their lower ends by angle members 6 and are further braced near their upper ends by similar angle members 8 having inwardly directed anges 9, the frame being substantiallycovered with sheet metal 10.

The apparatus comprises two distinct units, the first unit 11 including valve mechanism and necessary equipment for charging and supplying charged or carbonated water to a mixing chamb`er, and the second unit l2 including the mech- 70 anism for measuring and delivering a quantity of selected avoring material to the mixing chamber.

The first unit includes primarily a valve block 13 preferably rectangular in shape and supported 75 on a cross-bar 15 mounted on the flanges 9 of opposite angle members 8. In one face of the block are -provided a pair of aligned upper and lower valve sockets 16 and 17 while in an adjacent face of the block are formed upper and lower pairs of aligned valve sockets 19, 20 and 22, 23, all for purposes presently described. l

'I'he valve sockets are identical in construction and each includes a base recess 24 of decreased diameter Ato produce a lateral valve face 25 pro- 85 vided with an annular boss 26 for engaging a ilexible valve disk 27 retained against the boss byL the head 28 of al sleeve 29. The sleeve, in turn, is slidably extended through the opening 30 of a closure plate 32 secured to the block by screws 90 33, and through a ller washer 34 interposed between the head of the sleeve and the plate. A plunger 35, mounted in the bore of the sleeve, and provided with a head portion 36 seated in a counterbore 37 of the sleeve head, is adapted to urge 96 the valve disk to seating engagement with an annular boss 38 formed concentrically in the base of the reduced recess 24.

It will thus be evident that the ilexible valve disk prevents leakage of liquid around the head ofthe sleeve member and also serves to close a valve port 39 opening concentrically'through the boss 38. f

The valve mounted in the upper socket 16 controls flow of incoming liquid led from a water main through a conduit 40 and elbow nipple 42, as later more fully described, into a duct 43 formed in the valve block and opening through the inlet port, While the valve in the lower socket 17 selves to control drainage of liquid from the 'can flow downwardly through block through ducts 44 and 45, and a drain pipe 46 controlled by a valve 47 as shown in Fig. 5. As will be noted from Figs. 4 and -5, the duct 44 communicates the recesses of both valve sockets 16 and 17 so that water yentering through the conduit 40, when the upper valve is opened, k the duct 44 and through a conduit48 into a cylinder 49 for actuating various valve mechanisms of the machine as will later be evident. The cylinder is preferably fixed by U-clamps 50 to a bracket 52 having a plate portion 53 in turn xed to the valve block by screws or the like 54. The ends of the cylinder are closed by plates 55 and 56, the lower plate having a threaded opening 57 for receiving the pipe '48 and being also provided with a drain 58, while the upper plate 56 has a guide opening 59 to slidably receive a piston rod 60 carrying a piston 62 revciprocable in the cylinder.

Thus, by admitting liquid under pressure into the cylinder the' piston will, be' elevated and in order to utilize such movement thereof for actuating the valves in the sockets 19, 20 and 22, 23,

` chored by a spring 84 a pair of `flanged guide studs 63 are fixed in the bracket 52 for guiding a shift plate 64 connected to the piston rodby a link'65 carrying a flanged collar 6 6 vertically slidable in a guide groove 67 of the bracket. The lower end of the shift plate is resiliently anchored by spring 68 to a crossmember 69 of the cabinet frame tonormallyreturn the piston to its lowermost position and an elongated slot 70 formed in theshift plate near one of its side' edges terminates at its upper end in an offset portion 72 to produce a cam shoul der 73.' A lateral head 74 of an arm 75 fixed to a rock-shaft 76 slidablyengages the slot toeiect shifting' of the arm upon passage of the lateral head over the cam shoulder, and the rock-shaft is journaled in bearings 77 mounted on a plate 78y covering the valve sockets 1'9, 20 and 22, 23 so that rocker-arms 79 and 80, fixed on the rockshaft will actuate the valves mounted in these sockets in one direction, the valves in the sockets 22 and 2 3 being moved in the opposite direction by compression springs 81 anchored on the valve stems 35, these being the only valves in the valve '.block thatare not opened by fluid pressure. The

rocker-arms are provided at each end with adjustable set screws 82, the set screws of the arm 79 engaging the valves in the sockets 19 and 22 whileA the screws of the arm are adapted to bear against the valves in the sockets 20 and 23.

Upon elevation of the shift plate the head of the arm 75 will be moved out of engagement with. the lateral portion of 'the slot '10 to rock the shaft76 in one -direction and in order to urge the :rock-shaft in the opposite direction an arm 83,-isfixed thereto and its lower end is anto a bracket 85 of the frame.

- The inlet of through a duct 86 and an elbow coupling v8'1 to a cooling coil 88 arranged in a cooling chamber 89 vadjacent the upper end of the cabinet and adapted for receiving ice to coil, the opposite'end of the coil being connected to a conduit 90 leading to a source of water supply indicated bythe pipe 91 valved at 92, a check valve 93 being 'further interposed in the conduit passage therefrom through the valve socket 19 is connected cool the'iiquid in the eating with the utlet of the value socket 23.

Cold water from the cooling coll is, therefore, free to flow through the duct 86 into the recess of the valve socket 19 when the valve is open for a duct 97 into a tube 9 8 threaded on a neck 99 formed on the. upper face of the valve block 13.

The passageway controlled by the valve in the v socket 20 comprises a portion 102 leading into the duct 97 and terminating in a nozzle portion 103 for a purpose presently described. An inlet port 104 is connected by a line105 to a container or "gas bottle duct 100having a lateral 106 -of the usual commercial type containing a supply; of carbon dioxide gas under pressure. By discharging the carbon dioxide gas through the nozzle directly into the flow of cold water adjacent its point of discharge into the tube 98 a mixture of the gas and water or charging of the water 'with gas is effected. The upper end of the tube 98 is closed as indicated at 107 while spaced portsA 109 are provided near the lower end of the tube for escape of the charged fluid into a discharge chamber 110 produced by mounting -an inverted cup-shaped memberlll on a stud bolt 112 projecting upwardly from the valve block, the cup being securely retained on the valve block by a nut 113 threaded on the bolt, and a gasket 114 being inserted between the cup and block to prevent leakage of fluid from the chamber.

As clearly illustrated in Fig. 5, the valve closing the socket 23 controls a vent or drain pas sage 115 leading upwardly through a pipe 116 projecting from the valve block in to the chamber 110.

The valves in the sockets 16 and 17 arealternately closed an opened through the medium of a rocker-arm 117 fixed on a rock-shaft 118 journaled in bearings 119 similar to the bearings 77, each end of the rocker-arm being provided with a set screw 120 for engaging the .plunger end of a valve seated in the corresponding valve socket. A lever 121 having vone endsecured to the rockshaft is provided, at its opposite end, withv a clevis 122 operably connected with actuating mechanism now to be described.

While various means' may be employed' for moving the arm 120 to actuate the valves controlling the flow of liquid to the operating cylinder and drainage of liquid therefrom, l'. prefer to use a coin-controlled electromagnet or solenoid 123 including the usual core 124 surrounded by a coil or winding 125 mounted .on a bracket k 126 fixed in any convenient manner to the cabinet frame. The bracket includes a bearing arm 127 journaling a shaft 128 whereon is fixed a bell crank lever 129 having one end resiliently anchored to the solenoid support and having its .opposite end connected by a rod 130 to the clevis 122. An arm 132 likewise fixedI to thetshaft 128 is constructed of 'suitable iron for attraction by the core of the magnet when energized 'to rotate the shaft 128 for actuating the connecting rod, thereby moving the rocker-arm 117 to open the valve in the socket 16 for admitting liquid to the controlv cylinder and to simultaneously close the valve in the socket 17 for preventing escapeof li'quid from the cylinder. The solenoid winding may obviously be connected to any suitable source of electrical energy and is shown in Fig. 8, as being connected by conductors 133 and 134 to a wall plug 135. interposed in the conductor 134 is a toggle switch 136 mounted on a bearing plate 137 having one end supported by the crossy closed position.

plate 15 and its'opposite end carried by the wall ofthe cabinet. An. arm 138 of thetoggle switch is adapted to be engaged by a disk 139 slidably mounted on the reduced end of a shaft 140 and yieldingly retained thereon by a spring 142 seated on the shaft between the disk andan end cap 143 of the shaft.

The shaft. 140 is pivotally Supported by trunnions 144 on spaced bearing posts 145 having their lower ends secured to a grooved guide 146 mounted on the plate 137. The guide projects outwardly from the cabinet for receiving a slide 147 carrying a post-148 wherein is threaded a shaft 149 to engage the diskl39 and move it against tension of its related spring for throwing the switch. The slide is further provided with a coin opening 150 adapted to register with a coin receptacle of the cabinet for receiving a coin 152 of the desired denomination and is also provided with a slot 153 to admit the arm of the toggle switch.

In order to prevent actuation of the toggle switch with coins or slugs of less than regulation thickness a feeler 154 is secured to the outer end of the shaft 140, as best shown in Fig. 9 and a resilient adjustment is provided vtherefor including a bolt 155 anchored to a bracket 156 of the frame, and a spring -157 having one end seated on a boss 158 ofthe shaft 140 and its opposite end bearing against an adjusting nut/159 threaded on the bolt.l

The slide 147, after being pushed inwardly to throw the toggle switch for energizing the solenoid, is returned to its normal position by a spring 160l preferably anchored to one of the bearing posts 145 and to a lug Y162 fixed to the. slide. Other means must, however, beprovided for returning' the toggle switch toits former or open position after a drink-is dispensed from the machine and for this purpose I have provided a shaft 163 slidable in bearing brackets 164 and 165, respectively secured to the frame angle 8 and to the plate 137, one end ofthe shaft being adapted to engage the arm of the toggle switch while its opposite end bears against the outer end of an arm 166 fixed to a rod 167 extending transversely across thecabinet and journaled in the angles 8. A lever 168 is further fixed to the transverse shaft intermediate its ends and --is adapted to be engaged by a lateral projection 169 fixed to the shift plate 64 as clearly shown in switch when the piston has approached its upper limit of travel. Sleeved on the shaft 163 between the bearing bracket 164. and an enlarged end 170 of theshaft is a. spring 172 for normally returning a bossl portion 173 of the shaft to stop engagement with the bearing bracket '165 to permit free movement of the toggle switch to The mechanism' thus far described serve to deliver charged or carbonated water into Athe vchamber 110 and in order tomix the charged water with the desired navoring material it is conducted from the chamber throughan outlet port 174 and conduit 175 to a mixing chamber 176 for admixture of avoring syrup. by the .unit 12 now'to be described. f v A i The mixing chamber or housing 176 is secured in any suitable manner to suspended by bolts 178 from the cross-bar -15 for supporting the-'unit 12 and a drain pipe 179 leads from the` chamber through the front wall of the cabinet as shown at 180 and termi- '.nates in a down-,turned nozzle'182. 'Since it, is

desired to supply a comparatively wide range of flavors vfrom which a selection may be made'for Fig. 4 to open the toggle A .As will be evident,

a supporting plate 177 ilavoring a drink a plurality of syrup chambers or housings 183 are-arranged in an annular series on the plate 177 and may be secured thereto by clamping plates 184 and bolts 185 if desired, and outlet nipples -186 extending through the plate into the mixing chamber preferably project upwardly into the--syrup chambers to produce a valve seat for engagement by an outlet valve 187 mounted on the lower-end of a vertical valve rod 188. An inlet nipple 189 xed in the upper wall of the syrup housing projects down--` wardly therethrough to serve as a seat for an inlet valve 190 secured to the valvev stem in xed relation to the outlet valve. Each ofthe inlet and outlet valves may be provided with a resilient cushion 192 to insure against leakage when closed, one of the valves being closed while the other is open as will be apparent from Figs. 6 and 7. The valve stems of the several syrup chambers are extended upwardly through tubular supports 193 .arranged in an annular series about a central shaft 194'threadcd as indicated at 195A into the plate 177 and provided near its upper end with a spider 196 for retaining the -upper ends of the tubular members. vCarried on the extreme upper end of the tubes 193 above the spider are socket members 197 admitting air under having lateral ports. 198 for atmospheric pressure to the -tubes and into the syrup chambers.

Each valve rod is normally urged upwardly, for holding the inlet valve in closed condition, by means of a spring 199 seated inthe socket member and bearing against a cap 200 threaded on the valve stem. By depressing the valve rod against the tension of the spring the inlet valve is opened and the outlet valve is closed, .thus ad- -mitting'syrup through the nipple 189' into the Vperiphery so that the plunger can be aligned with any of the valve rods by rotating the gear, a spring. 207 being mounted on the plunger to normally return the plunger to its uppermost posi-V tion.

Rotation of the gear 202 is effected by means 125.

of a cooperating gear 208 fixed on the inner end of a shaft 209 journaled in the front wall of the cabinet, and fixed to the gear 208 as indicated at 210 is a notched disk 212 yieldingly engagedby awroller 213 carried on the outer end of an arm 214 having its inner end pivoted to the frame by a shaft 215, the roller beingurged into the notches of the disky by means such as a spring 216 having opposite ends respectively anchored to the cabinet and to the arm as shown at1217 and 218;

the notches of the disk correspond in number to the valve' rods o r syrup cham- -bersvand the position of the disk in relation to the gear202 is .so arranged thatwhen the roller V213 engages -a notch of the disk the plunger 205 will b e positioned directly over a valve rod. One of the projecting portions or teeth of the -dlsk is preferably provided vwith a notch 218' of the rocking Opposite sitidli.' in the cylinde handy wheel 219 is fixed to the outer end of the shaft extending through the cabinet wall and an. indicator hand or pointer 220 secured to the hub of the wheel is adapted for registering with indicia, 221 provided on an indicator plate 222 which may be secured in any suitable manner to the front wall of the cabinet. If desired, the indicia or numerals may be provided directly on the cabinet wall.

From the foregoing it will be evident that by rotating the gear 2024 through the medium of the gear 208 and hand wheel 219 the plunger 205 can be moved to registry with any of the valve rods 188 and upon such registry only 'a slight pressure on the plunger is required for opening the inlet and closing the outlet valve in a corresponding syrup chamber. Sucn depression of the plunger is preferably'acconiplished byl means including a disk 223 slidably mounted on the up'- per end of the central shaft 194, and limited in its sliding movement thereon by a cross-pin 224 extended through the hub of the disk and through an elongated slot 225 provided in the shaft.

Extending concentrica'lly through the extreme upper end of the shaft 194 and intersecting the elongated slot is a bore 226 for slidably receiving a pin 227 adapted to engage the cross-pin for depressing the slide on the shaft. A bracket 228 is clamped on the shaft 194 adjacent its upper end by a screw 229 and is provided with a pair of spaced arms 230 to pivotally mount therebetween a lever 232 having an adjusting screw 233 threadthe pin 227 so that rocking movement of the lever will depress the pin to actuate the plunger, the disk being returned to its original or inoperative position by a spring 234 seated between the collar 203 andthe hub of the disk. The end lever opposite the end carrying the adjusting screw is provided with an opening 235 for admitting the reduced upper end 236 of a vertical rod 237 having extended through the cross-bar 15 and provided with a thumb screw 238 to further adjust the po sition ofthe lever 232 relative to the bar. A shoulder 239 formed by-reducing the diameter the upper end cross-bar 240 having one end slidably engaging the smaller portion o! the rod and having its end nxed in upper end of the piston rod as shown at- 242. A head 243 formed on the upper end of the reduced rod portion 236 engages the rocking-lever 232 so that return of the piston to its lowermost poi 49 will coincidently draw the rod-237 downwardly, thereby releasing the adiustlngscrewfromcontactwiththepinzzv.

Resilient means, howeve is required for rocki118 the level' 232 in the I have securedan armr244 to the upper end of the bracket 52v as indicated at 245 and have formed an eyelet opening 246 on the projecting reduced neck 247 of jing, 249 t0 receive rod 237-. slidably mounted on the guide is a d of the arm for seating the a guide 246 having an openthe smaller portionof the sleeve 250 having an upper closed end 252 likewise mounted for/sliding movement on the reduced rod portion, the sleeve confining a spring 253 serving to urge the corresponding end' of .the rocking lever upwardly to depress ,the plunger 205 foractuating the valve rod in a downwardly direction.

As 'will be observed, 4cornpai'tively small and the syrup chambers are are intended to contain ',of the shaft 140 to allow the disk 139 to throw its lower end slidably' o sition shown any suitable manner to the.

opposite direction and only a sufilcient amount of syrup for` adding the desired avor to a single drink and it is therefore desirable to connect the nipple 189 of each chamber to a syrup reservoir or container 254 by means of suitable conduits 255. The containers are preferably formed of non-metallic material such as glass andV may be mounted on a machine at any desired location provided they are elevated sufllciently to deliver syrup from the containers by gravity tothe syrup chambers. As shown in Fig. 2 I prefer to arrange some of the containers along the inner face of one of the cabinet wallsand to position other of these containers adjacent the outer face of an opposite wall of the cabinet, the containers located exteriorly of the cabinet being enclosed by a housing 256 serving also to enclose 'the coin control and electro-magnetic mechanism.

Since the rocking leverV 243 and 'partsl of the actuating mechanism therefore are located slightly above the upper end of the machine, a hood 257 is provided on a cabinet cover 258 so that substantially the entire operating mechanism is enclosed to provide a sanitary machine of neat appearance.

In order to further enhance sanitation of the machine a refuse pipe 259 connected with the drain pipe is provided with a cone shaped receptacle 260 located exteriorly-of 'the machine and directly beneath the outlet 182 for receiving drippings from the outlet.

Assuming a drink vending machine to be constructed and assembled as'described, Operation thereof will be as follows:

The customer rotates the hand wheel 219 to register the indicator with the indicia representing his preferred flavor and thereupon inserts a coin in the coin opening of the'plunger 147. He. next pushes -the plunger. inwardly and Ithe feeler engaging the coinwill prevent rocking the toggle switch to closed position, thereby causing energization of the solenoid and, consequently,l attraction of the arm 132 for moving the connectingrod130torockthearm117tothepo- 1n rig. 4. l g further, that supply line is open,

the vvalve in the water water under line pressure thereupon forces the valve'in the valve socket 16 from itslseatto allow flow of the water into the operating cylinder. While the valve inthe valveinthesocketl'li u asshowninllg.6,re1easingthearm 240 fromtheshoulderoftheshaft237,thereby allowingdepresslonofthevalverodofaselocttcadmit'ameasuredsummitcamplate64iselevatedtogetherwiththepistontodisplaeetheheadofthearm75franthel lateral portion of thel slot in the shift plate, peningeachofthevalvesinthesockets therebyo 19and20toadmitcooled waterfrntheresi d bottle"-106 drawn from the solenoid core and moves the rocker-ann 117 in opposite direction to close the valve in the socket 16 and to open the valve in the socket 17 for communicating the discharge end of the cylinder with the drain.

The shift plate under tension of the spring 68 is thereafter moved downwardly together with the piston in the cylinder until the head of the arm 75 engages the lateral portion 72 of the shift plate slot., With -the arm 75 in this position, or as shown in Fig. 5, the valves in the sockets 19 and 20 are closed while the valves in the sockets 22 and 23 are opened to admit atmospheric pressure through the vent pipe into the chamber to displace the liquid in the chamber through the line 175 into the mixing chamber. Lowering movementof the piston will also cause engagement ot the arm 240 with the shoulder on the rod 237 (Fig. 7) thus compressing the spring 253 and releasing the pressure on the plunger 205 to permit closing of the inlet and opening of the outlet valve in the'syrup chamber for discharge of the measured amount of syrup into the mixing chamber. From the mixing chamber the charged water, and flavoring material commingled therewith, is delivered through the discharge spout into a cup or suitable receptacle for receiving the drink.

From the foregoing it will be apparent that the operation of the machine is entirely automatic after a coin of the required denomination has been inserted therein and that measured quantities of charged water and flavoring material are simultaneously dispensedto the customer.

What I claim and desire to secure by Letters Patent is: v

1. In apparatus oi' the character described, a mixing chamber, means for delivering measured amounts of liquid to said chamber, an annular series of syrup chambers arranged about a center common with the axis of the mixing chamber and having outlets communicating with the mixing chamber, valve mechanisms controlling flow of syrup from said outlets, an actuator movable to operative relation with any of said mechanisms, and means responsive to operation of said ilrst named means for operating said actuator.

2. In apparatus of the character described, a mixing chamber, means for'delivering measured quantities of liquid to said chamber, a syrup chamber having an outlet in communication with the mixing chamber and having an inlet, a valve rod carrying inlet and outlet valves for alternately closing said inlet and outlet, yielding means for actuating said valve rod and means responsive to operation of said first named means for controlling actuation of said yielding means.

3. In apparatus of the character described. a mixing chamber, means for delivering measured quantities o1 liquid to said chamber, an annular horizontal series oi' syrup chambers having outlets individually communicating with the mixing chamber, valves controlling ow of syrup from said outlets, an actuator movable for selective operative engagement with any of said valves, and means for moving said actuator to operative alignment with a selected valve.

4. In apparatus of the character described, a mixing chamber, means including a cylinder and a piston reciprocable in the cylinder for delivering measured quantities of liquid to said chamber,`

a syrup chamber having an outlet in communication with the mixing chamber, a valve for controlling said outlet, yielding means for opening the valve, spring-pressed means for closing the valve,` and means operably connected to said piston for limiting actuation of said spring-pressed means to predetermined positions of the piston for effecting simultaneous discharge of syrup from the syrup chamber and of a measured quantity of liquid into the mixing chamber.

5; In combination with a water main, a mixing chamber, a charging chamber communicating with the mixing chamber,v liquid and gas conduits leading to said charging ch-amber, valves interposed in the conduits, a cylinder, a pipe connecting the cylinder with said main. a piston movable in said cylinder in one direction by the pressure of the water in said main and operably connected with said valves, resilient means for moving the piston in the opposite direction, a syrup chamber in communication with the mixing chamber, and valve means operable in response to reciprocation of said piston for discharging syrup from the syrup chamber into the mixing chamber.

6. In apparatus of the character described, a mixing chamber, a charging chamber communieating with the mixing chamber, liquid and gas conduits leading to said charging chamber, valves interposed in the conduits, a cylinder, a piston 100 reciprocable in the cylinder and operablyv connected with said valves forcoincidently operating said valves to effect simultaneous discharge, of liquid and gas into the charging chamber for charging said liquid with the gas, a plurality of syrup chambers having outlets in communication with the mixing chamber, valves for the outlets, and mechanism selectively engageable with any of said last named valves and operable in response to reciprocation of said piston for discharging syrup from a selected syrup chamber into the mixing chamber.

7. In combination with a water main, a charging chamber, liquid and gas conduits leading to said charging chamber, valves controlling flow through said conduits, a cylinder, a pipe connecting the cylinder to said water main, a valve in the pipe, a piston in the cylinder operably connected with the ilrst named valves and means for actuating said last named valve to admit water from 120 the main under pressure to the cylinder and eiiect actuation of the first named valves by the piston.

8. In combination with a source of fluid pressure, a charging chamber, liquid and gas conduits leading to said charging chamber, 'valves controlling flow through said conduits, a cylinder, a pipe connecting the cylinder to said source of fluid pressure and having a drain branch, valves in said pipe and branch, a piston in the cylinder operatively connected with the first named valves, and means for alternately opening and closing the last named valves for respectively admitting and draining iiuid from said cylinder.

9. In combination with a source of fluid pressure, a charging chamber, liquid and gas conduits leading to said charging chamber, drain and vent conduits leading from said chamber, valve mechanism for opening and closing the liquid and gas conduits alternately to opening and closing of the drain and vent conduits, a cylinder, a pipe connecting the cylinder to said source of iluid presf sure and having a drain branch, valves in said pipe and branch, a piston in the cylinder operatively connected wlth said rst named valve mechanism, and means including an electro-magnet for alternately actuating said last named valves.

10. In apparatus of the character described, a mixing chamber, means for delivering charged liquid to said chamber, an annular series of syrup annular series ci chambers,

chambers having outlets communicating with the mixing chamber, valves controlling flow oi syrup from said outlets, a gear concentric with said a plunger slidable in said gear in eccentric relation to the axis of the gear for selective registry with any of said valves upon rotation ci the gear, and means for rotating the gear.

11. In combination with a source of fluid pressure, a valve block including a lcharging chamber, liquid and gas conduits leading to saidl charging chamber, drain and vent conduits leading from said chamber, valve mechanism including valves in said block for opening and closing the liquid and gas conduits alternately to opening and closing of the drain and vent conduits, a cylinder,l a conduit extending through the valve block connecting the cylinder to said source of iluid pressure and having a drain branch, valves in the block for said conduit and branch, a piston in the cylinder operatively connected with said hrst named valves, and means for alternately actuating said last named valves.

12. In combination with a source or iluid pressure, a charging chamber, liquid and gas conduits leading to said charging chamber, drain and vent conduits, and means respectively engaged with the valves in the liquid and drain conduits, a rocker arm having opposite ends respectively engaged with the valves in the gas and vent conduits, a common shaft carrying said arms in ilxed relation to each other, a cylinder, a pipe connecting the cylinder to said source of iluid pressure, a valve in said pipe, a piston in the cylinder and operatively connected with said shaft for opening and closing the valves in the liquid and gas conduits alternately to opening and closing of the valves in the drain and vent for actuating the valve in said pipe to admit iluld under pressure to the cylinder to eiiect actuation of the ilrst named valves by said piston.

13. In apparatus o! the character described, a mixing chamber, means for delivering measured amounts of liquid to said chamber, a plate covering the chamber, a shaft mounted perpendicularly on the plate, an annular series oi syrup chambers arranged about said shaft in communicating relation with the mixing chamber, a valve for each syrup chamber to control ilow ot syrup into the mixing chamber, a gear journalled on the shaft above said valves, a plunger slidable in said gear for selective registry with any of said valves upon rotation oi the gear, means for rotating the gear, and means responsive to actuation oi said tlrst named means for effecting operation of said plunger and discharge of syrup from a syrup chamber into the mixing chamber. 14. In apparatus oi the character described, a mixing chamber, means for delivering measured amounts of liquid to said chamber, a plate covering the chamber, a shaft mounted perpendicularly on the plate, an annularseries of syrup chambers arranged about said shaft in ,communicating rela-- tion with the mixing chamber, a valve for each to control ilow of syrup into the mixing chamber, a gear journalled on the shaft above said valves, a plunger slidable in said gear for selective registry with any of said valves upon rotation o f the gear, means for rotating the gear, a disk slidably mounted on the shaft above said gear for engagement with the plunger, an arm pivotally carried by the shaft and operatively connected with the disk, and means responsive to actuation of said iirst named means for rocking said arm to effect discharge of syrup from a syrup chamber into the mixing chamber.

ERICK 

